/* * wm8961.c -- WM8961 ALSA SoC Audio driver * * Author: Mark Brown * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Currently unimplemented features: * - ALC */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8961.h" #define WM8961_MAX_REGISTER 0xFC static u16 wm8961_reg_defaults[] = { 0x009F, /* R0 - Left Input volume */ 0x009F, /* R1 - Right Input volume */ 0x0000, /* R2 - LOUT1 volume */ 0x0000, /* R3 - ROUT1 volume */ 0x0020, /* R4 - Clocking1 */ 0x0008, /* R5 - ADC & DAC Control 1 */ 0x0000, /* R6 - ADC & DAC Control 2 */ 0x000A, /* R7 - Audio Interface 0 */ 0x01F4, /* R8 - Clocking2 */ 0x0000, /* R9 - Audio Interface 1 */ 0x00FF, /* R10 - Left DAC volume */ 0x00FF, /* R11 - Right DAC volume */ 0x0000, /* R12 */ 0x0000, /* R13 */ 0x0040, /* R14 - Audio Interface 2 */ 0x0000, /* R15 - Software Reset */ 0x0000, /* R16 */ 0x007B, /* R17 - ALC1 */ 0x0000, /* R18 - ALC2 */ 0x0032, /* R19 - ALC3 */ 0x0000, /* R20 - Noise Gate */ 0x00C0, /* R21 - Left ADC volume */ 0x00C0, /* R22 - Right ADC volume */ 0x0120, /* R23 - Additional control(1) */ 0x0000, /* R24 - Additional control(2) */ 0x0000, /* R25 - Pwr Mgmt (1) */ 0x0000, /* R26 - Pwr Mgmt (2) */ 0x0000, /* R27 - Additional Control (3) */ 0x0000, /* R28 - Anti-pop */ 0x0000, /* R29 */ 0x005F, /* R30 - Clocking 3 */ 0x0000, /* R31 */ 0x0000, /* R32 - ADCL signal path */ 0x0000, /* R33 - ADCR signal path */ 0x0000, /* R34 */ 0x0000, /* R35 */ 0x0000, /* R36 */ 0x0000, /* R37 */ 0x0000, /* R38 */ 0x0000, /* R39 */ 0x0000, /* R40 - LOUT2 volume */ 0x0000, /* R41 - ROUT2 volume */ 0x0000, /* R42 */ 0x0000, /* R43 */ 0x0000, /* R44 */ 0x0000, /* R45 */ 0x0000, /* R46 */ 0x0000, /* R47 - Pwr Mgmt (3) */ 0x0023, /* R48 - Additional Control (4) */ 0x0000, /* R49 - Class D Control 1 */ 0x0000, /* R50 */ 0x0003, /* R51 - Class D Control 2 */ 0x0000, /* R52 */ 0x0000, /* R53 */ 0x0000, /* R54 */ 0x0000, /* R55 */ 0x0106, /* R56 - Clocking 4 */ 0x0000, /* R57 - DSP Sidetone 0 */ 0x0000, /* R58 - DSP Sidetone 1 */ 0x0000, /* R59 */ 0x0000, /* R60 - DC Servo 0 */ 0x0000, /* R61 - DC Servo 1 */ 0x0000, /* R62 */ 0x015E, /* R63 - DC Servo 3 */ 0x0010, /* R64 */ 0x0010, /* R65 - DC Servo 5 */ 0x0000, /* R66 */ 0x0001, /* R67 */ 0x0003, /* R68 - Analogue PGA Bias */ 0x0000, /* R69 - Analogue HP 0 */ 0x0060, /* R70 */ 0x01FB, /* R71 - Analogue HP 2 */ 0x0000, /* R72 - Charge Pump 1 */ 0x0065, /* R73 */ 0x005F, /* R74 */ 0x0059, /* R75 */ 0x006B, /* R76 */ 0x0038, /* R77 */ 0x000C, /* R78 */ 0x000A, /* R79 */ 0x006B, /* R80 */ 0x0000, /* R81 */ 0x0000, /* R82 - Charge Pump B */ 0x0087, /* R83 */ 0x0000, /* R84 */ 0x005C, /* R85 */ 0x0000, /* R86 */ 0x0000, /* R87 - Write Sequencer 1 */ 0x0000, /* R88 - Write Sequencer 2 */ 0x0000, /* R89 - Write Sequencer 3 */ 0x0000, /* R90 - Write Sequencer 4 */ 0x0000, /* R91 - Write Sequencer 5 */ 0x0000, /* R92 - Write Sequencer 6 */ 0x0000, /* R93 - Write Sequencer 7 */ 0x0000, /* R94 */ 0x0000, /* R95 */ 0x0000, /* R96 */ 0x0000, /* R97 */ 0x0000, /* R98 */ 0x0000, /* R99 */ 0x0000, /* R100 */ 0x0000, /* R101 */ 0x0000, /* R102 */ 0x0000, /* R103 */ 0x0000, /* R104 */ 0x0000, /* R105 */ 0x0000, /* R106 */ 0x0000, /* R107 */ 0x0000, /* R108 */ 0x0000, /* R109 */ 0x0000, /* R110 */ 0x0000, /* R111 */ 0x0000, /* R112 */ 0x0000, /* R113 */ 0x0000, /* R114 */ 0x0000, /* R115 */ 0x0000, /* R116 */ 0x0000, /* R117 */ 0x0000, /* R118 */ 0x0000, /* R119 */ 0x0000, /* R120 */ 0x0000, /* R121 */ 0x0000, /* R122 */ 0x0000, /* R123 */ 0x0000, /* R124 */ 0x0000, /* R125 */ 0x0000, /* R126 */ 0x0000, /* R127 */ 0x0000, /* R128 */ 0x0000, /* R129 */ 0x0000, /* R130 */ 0x0000, /* R131 */ 0x0000, /* R132 */ 0x0000, /* R133 */ 0x0000, /* R134 */ 0x0000, /* R135 */ 0x0000, /* R136 */ 0x0000, /* R137 */ 0x0000, /* R138 */ 0x0000, /* R139 */ 0x0000, /* R140 */ 0x0000, /* R141 */ 0x0000, /* R142 */ 0x0000, /* R143 */ 0x0000, /* R144 */ 0x0000, /* R145 */ 0x0000, /* R146 */ 0x0000, /* R147 */ 0x0000, /* R148 */ 0x0000, /* R149 */ 0x0000, /* R150 */ 0x0000, /* R151 */ 0x0000, /* R152 */ 0x0000, /* R153 */ 0x0000, /* R154 */ 0x0000, /* R155 */ 0x0000, /* R156 */ 0x0000, /* R157 */ 0x0000, /* R158 */ 0x0000, /* R159 */ 0x0000, /* R160 */ 0x0000, /* R161 */ 0x0000, /* R162 */ 0x0000, /* R163 */ 0x0000, /* R164 */ 0x0000, /* R165 */ 0x0000, /* R166 */ 0x0000, /* R167 */ 0x0000, /* R168 */ 0x0000, /* R169 */ 0x0000, /* R170 */ 0x0000, /* R171 */ 0x0000, /* R172 */ 0x0000, /* R173 */ 0x0000, /* R174 */ 0x0000, /* R175 */ 0x0000, /* R176 */ 0x0000, /* R177 */ 0x0000, /* R178 */ 0x0000, /* R179 */ 0x0000, /* R180 */ 0x0000, /* R181 */ 0x0000, /* R182 */ 0x0000, /* R183 */ 0x0000, /* R184 */ 0x0000, /* R185 */ 0x0000, /* R186 */ 0x0000, /* R187 */ 0x0000, /* R188 */ 0x0000, /* R189 */ 0x0000, /* R190 */ 0x0000, /* R191 */ 0x0000, /* R192 */ 0x0000, /* R193 */ 0x0000, /* R194 */ 0x0000, /* R195 */ 0x0030, /* R196 */ 0x0006, /* R197 */ 0x0000, /* R198 */ 0x0060, /* R199 */ 0x0000, /* R200 */ 0x003F, /* R201 */ 0x0000, /* R202 */ 0x0000, /* R203 */ 0x0000, /* R204 */ 0x0001, /* R205 */ 0x0000, /* R206 */ 0x0181, /* R207 */ 0x0005, /* R208 */ 0x0008, /* R209 */ 0x0008, /* R210 */ 0x0000, /* R211 */ 0x013B, /* R212 */ 0x0000, /* R213 */ 0x0000, /* R214 */ 0x0000, /* R215 */ 0x0000, /* R216 */ 0x0070, /* R217 */ 0x0000, /* R218 */ 0x0000, /* R219 */ 0x0000, /* R220 */ 0x0000, /* R221 */ 0x0000, /* R222 */ 0x0003, /* R223 */ 0x0000, /* R224 */ 0x0000, /* R225 */ 0x0001, /* R226 */ 0x0008, /* R227 */ 0x0000, /* R228 */ 0x0000, /* R229 */ 0x0000, /* R230 */ 0x0000, /* R231 */ 0x0004, /* R232 */ 0x0000, /* R233 */ 0x0000, /* R234 */ 0x0000, /* R235 */ 0x0000, /* R236 */ 0x0000, /* R237 */ 0x0080, /* R238 */ 0x0000, /* R239 */ 0x0000, /* R240 */ 0x0000, /* R241 */ 0x0000, /* R242 */ 0x0000, /* R243 */ 0x0000, /* R244 */ 0x0052, /* R245 */ 0x0110, /* R246 */ 0x0040, /* R247 */ 0x0000, /* R248 */ 0x0030, /* R249 */ 0x0000, /* R250 */ 0x0000, /* R251 */ 0x0001, /* R252 - General test 1 */ }; struct wm8961_priv { struct snd_soc_codec codec; int sysclk; u16 reg_cache[WM8961_MAX_REGISTER]; }; static int wm8961_volatile_register(unsigned int reg) { switch (reg) { case WM8961_SOFTWARE_RESET: case WM8961_WRITE_SEQUENCER_7: case WM8961_DC_SERVO_1: return 1; default: return 0; } } static int wm8961_reset(struct snd_soc_codec *codec) { return snd_soc_write(codec, WM8961_SOFTWARE_RESET, 0); } /* * The headphone output supports special anti-pop sequences giving * silent power up and power down. */ static int wm8961_hp_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_codec *codec = w->codec; u16 hp_reg = snd_soc_read(codec, WM8961_ANALOGUE_HP_0); u16 cp_reg = snd_soc_read(codec, WM8961_CHARGE_PUMP_1); u16 pwr_reg = snd_soc_read(codec, WM8961_PWR_MGMT_2); u16 dcs_reg = snd_soc_read(codec, WM8961_DC_SERVO_1); int timeout = 500; if (event & SND_SOC_DAPM_POST_PMU) { /* Make sure the output is shorted */ hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT); snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); /* Enable the charge pump */ cp_reg |= WM8961_CP_ENA; snd_soc_write(codec, WM8961_CHARGE_PUMP_1, cp_reg); mdelay(5); /* Enable the PGA */ pwr_reg |= WM8961_LOUT1_PGA | WM8961_ROUT1_PGA; snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); /* Enable the amplifier */ hp_reg |= WM8961_HPR_ENA | WM8961_HPL_ENA; snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); /* Second stage enable */ hp_reg |= WM8961_HPR_ENA_DLY | WM8961_HPL_ENA_DLY; snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); /* Enable the DC servo & trigger startup */ dcs_reg |= WM8961_DCS_ENA_CHAN_HPR | WM8961_DCS_TRIG_STARTUP_HPR | WM8961_DCS_ENA_CHAN_HPL | WM8961_DCS_TRIG_STARTUP_HPL; dev_dbg(codec->dev, "Enabling DC servo\n"); snd_soc_write(codec, WM8961_DC_SERVO_1, dcs_reg); do { msleep(1); dcs_reg = snd_soc_read(codec, WM8961_DC_SERVO_1); } while (--timeout && dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR | WM8961_DCS_TRIG_STARTUP_HPL)); if (dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR | WM8961_DCS_TRIG_STARTUP_HPL)) dev_err(codec->dev, "DC servo timed out\n"); else dev_dbg(codec->dev, "DC servo startup complete\n"); /* Enable the output stage */ hp_reg |= WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP; snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); /* Remove the short on the output stage */ hp_reg |= WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT; snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); } if (event & SND_SOC_DAPM_PRE_PMD) { /* Short the output */ hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT); snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); /* Disable the output stage */ hp_reg &= ~(WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP); snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); /* Disable DC offset cancellation */ dcs_reg &= ~(WM8961_DCS_ENA_CHAN_HPR | WM8961_DCS_ENA_CHAN_HPL); snd_soc_write(codec, WM8961_DC_SERVO_1, dcs_reg); /* Finish up */ hp_reg &= ~(WM8961_HPR_ENA_DLY | WM8961_HPR_ENA | WM8961_HPL_ENA_DLY | WM8961_HPL_ENA); snd_soc_write(codec, WM8961_ANALOGUE_HP_0, hp_reg); /* Disable the PGA */ pwr_reg &= ~(WM8961_LOUT1_PGA | WM8961_ROUT1_PGA); snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); /* Disable the charge pump */ dev_dbg(codec->dev, "Disabling charge pump\n"); snd_soc_write(codec, WM8961_CHARGE_PUMP_1, cp_reg & ~WM8961_CP_ENA); } return 0; } static int wm8961_spk_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_codec *codec = w->codec; u16 pwr_reg = snd_soc_read(codec, WM8961_PWR_MGMT_2); u16 spk_reg = snd_soc_read(codec, WM8961_CLASS_D_CONTROL_1); if (event & SND_SOC_DAPM_POST_PMU) { /* Enable the PGA */ pwr_reg |= WM8961_SPKL_PGA | WM8961_SPKR_PGA; snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); /* Enable the amplifier */ spk_reg |= WM8961_SPKL_ENA | WM8961_SPKR_ENA; snd_soc_write(codec, WM8961_CLASS_D_CONTROL_1, spk_reg); } if (event & SND_SOC_DAPM_PRE_PMD) { /* Enable the amplifier */ spk_reg &= ~(WM8961_SPKL_ENA | WM8961_SPKR_ENA); snd_soc_write(codec, WM8961_CLASS_D_CONTROL_1, spk_reg); /* Enable the PGA */ pwr_reg &= ~(WM8961_SPKL_PGA | WM8961_SPKR_PGA); snd_soc_write(codec, WM8961_PWR_MGMT_2, pwr_reg); } return 0; } static const char *adc_hpf_text[] = { "Hi-fi", "Voice 1", "Voice 2", "Voice 3", }; static const struct soc_enum adc_hpf = SOC_ENUM_SINGLE(WM8961_ADC_DAC_CONTROL_2, 7, 4, adc_hpf_text); static const char *dac_deemph_text[] = { "None", "32kHz", "44.1kHz", "48kHz", }; static const struct soc_enum dac_deemph = SOC_ENUM_SINGLE(WM8961_ADC_DAC_CONTROL_1, 1, 4, dac_deemph_text); static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); static const DECLARE_TLV_DB_SCALE(hp_sec_tlv, -700, 100, 0); static const DECLARE_TLV_DB_SCALE(adc_tlv, -7200, 75, 1); static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -3600, 300, 0); static unsigned int boost_tlv[] = { TLV_DB_RANGE_HEAD(4), 0, 0, TLV_DB_SCALE_ITEM(0, 0, 0), 1, 1, TLV_DB_SCALE_ITEM(13, 0, 0), 2, 2, TLV_DB_SCALE_ITEM(20, 0, 0), 3, 3, TLV_DB_SCALE_ITEM(29, 0, 0), }; static const DECLARE_TLV_DB_SCALE(pga_tlv, -2325, 75, 0); static const struct snd_kcontrol_new wm8961_snd_controls[] = { SOC_DOUBLE_R_TLV("Headphone Volume", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME, 0, 127, 0, out_tlv), SOC_DOUBLE_TLV("Headphone Secondary Volume", WM8961_ANALOGUE_HP_2, 6, 3, 7, 0, hp_sec_tlv), SOC_DOUBLE_R("Headphone ZC Switch", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME, 7, 1, 0), SOC_DOUBLE_R_TLV("Speaker Volume", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME, 0, 127, 0, out_tlv), SOC_DOUBLE_R("Speaker ZC Switch", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME, 7, 1, 0), SOC_SINGLE("Speaker AC Gain", WM8961_CLASS_D_CONTROL_2, 0, 7, 0), SOC_SINGLE("DAC x128 OSR Switch", WM8961_ADC_DAC_CONTROL_2, 0, 1, 0), SOC_ENUM("DAC Deemphasis", dac_deemph), SOC_SINGLE("DAC Soft Mute Switch", WM8961_ADC_DAC_CONTROL_2, 3, 1, 0), SOC_DOUBLE_R_TLV("Sidetone Volume", WM8961_DSP_SIDETONE_0, WM8961_DSP_SIDETONE_1, 4, 12, 0, sidetone_tlv), SOC_SINGLE("ADC High Pass Filter Switch", WM8961_ADC_DAC_CONTROL_1, 0, 1, 0), SOC_ENUM("ADC High Pass Filter Mode", adc_hpf), SOC_DOUBLE_R_TLV("Capture Volume", WM8961_LEFT_ADC_VOLUME, WM8961_RIGHT_ADC_VOLUME, 1, 119, 0, adc_tlv), SOC_DOUBLE_R_TLV("Capture Boost Volume", WM8961_ADCL_SIGNAL_PATH, WM8961_ADCR_SIGNAL_PATH, 4, 3, 0, boost_tlv), SOC_DOUBLE_R_TLV("Capture PGA Volume", WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME, 0, 62, 0, pga_tlv), SOC_DOUBLE_R("Capture PGA ZC Switch", WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME, 6, 1, 1), SOC_DOUBLE_R("Capture PGA Switch", WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME, 7, 1, 1), }; static const char *sidetone_text[] = { "None", "Left", "Right" }; static const struct soc_enum dacl_sidetone = SOC_ENUM_SINGLE(WM8961_DSP_SIDETONE_0, 2, 3, sidetone_text); static const struct soc_enum dacr_sidetone = SOC_ENUM_SINGLE(WM8961_DSP_SIDETONE_1, 2, 3, sidetone_text); static const struct snd_kcontrol_new dacl_mux = SOC_DAPM_ENUM("DACL Sidetone", dacl_sidetone); static const struct snd_kcontrol_new dacr_mux = SOC_DAPM_ENUM("DACR Sidetone", dacr_sidetone); static const struct snd_soc_dapm_widget wm8961_dapm_widgets[] = { SND_SOC_DAPM_INPUT("LINPUT"), SND_SOC_DAPM_INPUT("RINPUT"), SND_SOC_DAPM_SUPPLY("CLK_DSP", WM8961_CLOCKING2, 4, 0, NULL, 0), SND_SOC_DAPM_PGA("Left Input", WM8961_PWR_MGMT_1, 5, 0, NULL, 0), SND_SOC_DAPM_PGA("Right Input", WM8961_PWR_MGMT_1, 4, 0, NULL, 0), SND_SOC_DAPM_ADC("ADCL", "HiFi Capture", WM8961_PWR_MGMT_1, 3, 0), SND_SOC_DAPM_ADC("ADCR", "HiFi Capture", WM8961_PWR_MGMT_1, 2, 0), SND_SOC_DAPM_MICBIAS("MICBIAS", WM8961_PWR_MGMT_1, 1, 0), SND_SOC_DAPM_MUX("DACL Sidetone", SND_SOC_NOPM, 0, 0, &dacl_mux), SND_SOC_DAPM_MUX("DACR Sidetone", SND_SOC_NOPM, 0, 0, &dacr_mux), SND_SOC_DAPM_DAC("DACL", "HiFi Playback", WM8961_PWR_MGMT_2, 8, 0), SND_SOC_DAPM_DAC("DACR", "HiFi Playback", WM8961_PWR_MGMT_2, 7, 0), /* Handle as a mono path for DCS */ SND_SOC_DAPM_PGA_E("Headphone Output", SND_SOC_NOPM, 4, 0, NULL, 0, wm8961_hp_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_PGA_E("Speaker Output", SND_SOC_NOPM, 4, 0, NULL, 0, wm8961_spk_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_OUTPUT("HP_L"), SND_SOC_DAPM_OUTPUT("HP_R"), SND_SOC_DAPM_OUTPUT("SPK_LN"), SND_SOC_DAPM_OUTPUT("SPK_LP"), SND_SOC_DAPM_OUTPUT("SPK_RN"), SND_SOC_DAPM_OUTPUT("SPK_RP"), }; static const struct snd_soc_dapm_route audio_paths[] = { { "DACL", NULL, "CLK_DSP" }, { "DACL", NULL, "DACL Sidetone" }, { "DACR", NULL, "CLK_DSP" }, { "DACR", NULL, "DACR Sidetone" }, { "DACL Sidetone", "Left", "ADCL" }, { "DACL Sidetone", "Right", "ADCR" }, { "DACR Sidetone", "Left", "ADCL" }, { "DACR Sidetone", "Right", "ADCR" }, { "HP_L", NULL, "Headphone Output" }, { "HP_R", NULL, "Headphone Output" }, { "Headphone Output", NULL, "DACL" }, { "Headphone Output", NULL, "DACR" }, { "SPK_LN", NULL, "Speaker Output" }, { "SPK_LP", NULL, "Speaker Output" }, { "SPK_RN", NULL, "Speaker Output" }, { "SPK_RP", NULL, "Speaker Output" }, { "Speaker Output", NULL, "DACL" }, { "Speaker Output", NULL, "DACR" }, { "ADCL", NULL, "Left Input" }, { "ADCL", NULL, "CLK_DSP" }, { "ADCR", NULL, "Right Input" }, { "ADCR", NULL, "CLK_DSP" }, { "Left Input", NULL, "LINPUT" }, { "Right Input", NULL, "RINPUT" }, }; /* Values for CLK_SYS_RATE */ static struct { int ratio; u16 val; } wm8961_clk_sys_ratio[] = { { 64, 0 }, { 128, 1 }, { 192, 2 }, { 256, 3 }, { 384, 4 }, { 512, 5 }, { 768, 6 }, { 1024, 7 }, { 1408, 8 }, { 1536, 9 }, }; /* Values for SAMPLE_RATE */ static struct { int rate; u16 val; } wm8961_srate[] = { { 48000, 0 }, { 44100, 0 }, { 32000, 1 }, { 22050, 2 }, { 24000, 2 }, { 16000, 3 }, { 11250, 4 }, { 12000, 4 }, { 8000, 5 }, }; static int wm8961_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; struct wm8961_priv *wm8961 = snd_soc_codec_get_drvdata(codec); int i, best, target, fs; u16 reg; fs = params_rate(params); if (!wm8961->sysclk) { dev_err(codec->dev, "MCLK has not been specified\n"); return -EINVAL; } /* Find the closest sample rate for the filters */ best = 0; for (i = 0; i < ARRAY_SIZE(wm8961_srate); i++) { if (abs(wm8961_srate[i].rate - fs) < abs(wm8961_srate[best].rate - fs)) best = i; } reg = snd_soc_read(codec, WM8961_ADDITIONAL_CONTROL_3); reg &= ~WM8961_SAMPLE_RATE_MASK; reg |= wm8961_srate[best].val; snd_soc_write(codec, WM8961_ADDITIONAL_CONTROL_3, reg); dev_dbg(codec->dev, "Selected SRATE %dHz for %dHz\n", wm8961_srate[best].rate, fs); /* Select a CLK_SYS/fs ratio equal to or higher than required */ target = wm8961->sysclk / fs; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && target < 64) { dev_err(codec->dev, "SYSCLK must be at least 64*fs for DAC\n"); return -EINVAL; } if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && target < 256) { dev_err(codec->dev, "SYSCLK must be at least 256*fs for ADC\n"); return -EINVAL; } for (i = 0; i < ARRAY_SIZE(wm8961_clk_sys_ratio); i++) { if (wm8961_clk_sys_ratio[i].ratio >= target) break; } if (i == ARRAY_SIZE(wm8961_clk_sys_ratio)) { dev_err(codec->dev, "Unable to generate CLK_SYS_RATE\n"); return -EINVAL; } dev_dbg(codec->dev, "Selected CLK_SYS_RATE of %d for %d/%d=%d\n", wm8961_clk_sys_ratio[i].ratio, wm8961->sysclk, fs, wm8961->sysclk / fs); reg = snd_soc_read(codec, WM8961_CLOCKING_4); reg &= ~WM8961_CLK_SYS_RATE_MASK; reg |= wm8961_clk_sys_ratio[i].val << WM8961_CLK_SYS_RATE_SHIFT; snd_soc_write(codec, WM8961_CLOCKING_4, reg); reg = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_0); reg &= ~WM8961_WL_MASK; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: reg |= 1 << WM8961_WL_SHIFT; break; case SNDRV_PCM_FORMAT_S24_LE: reg |= 2 << WM8961_WL_SHIFT; break; case SNDRV_PCM_FORMAT_S32_LE: reg |= 3 << WM8961_WL_SHIFT; break; default: return -EINVAL; } snd_soc_write(codec, WM8961_AUDIO_INTERFACE_0, reg); /* Sloping stop-band filter is recommended for <= 24kHz */ reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_2); if (fs <= 24000) reg |= WM8961_DACSLOPE; else reg &= WM8961_DACSLOPE; snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_2, reg); return 0; } static int wm8961_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = dai->codec; struct wm8961_priv *wm8961 = snd_soc_codec_get_drvdata(codec); u16 reg = snd_soc_read(codec, WM8961_CLOCKING1); if (freq > 33000000) { dev_err(codec->dev, "MCLK must be <33MHz\n"); return -EINVAL; } if (freq > 16500000) { dev_dbg(codec->dev, "Using MCLK/2 for %dHz MCLK\n", freq); reg |= WM8961_MCLKDIV; freq /= 2; } else { dev_dbg(codec->dev, "Using MCLK/1 for %dHz MCLK\n", freq); reg &= WM8961_MCLKDIV; } snd_soc_write(codec, WM8961_CLOCKING1, reg); wm8961->sysclk = freq; return 0; } static int wm8961_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct snd_soc_codec *codec = dai->codec; u16 aif = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_0); aif &= ~(WM8961_BCLKINV | WM8961_LRP | WM8961_MS | WM8961_FORMAT_MASK); switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: aif |= WM8961_MS; break; case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: aif |= 1; break; case SND_SOC_DAIFMT_I2S: aif |= 2; break; case SND_SOC_DAIFMT_DSP_B: aif |= WM8961_LRP; case SND_SOC_DAIFMT_DSP_A: aif |= 3; switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: case SND_SOC_DAIFMT_IB_NF: break; default: return -EINVAL; } break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_NB_IF: aif |= WM8961_LRP; break; case SND_SOC_DAIFMT_IB_NF: aif |= WM8961_BCLKINV; break; case SND_SOC_DAIFMT_IB_IF: aif |= WM8961_BCLKINV | WM8961_LRP; break; default: return -EINVAL; } return snd_soc_write(codec, WM8961_AUDIO_INTERFACE_0, aif); } static int wm8961_set_tristate(struct snd_soc_dai *dai, int tristate) { struct snd_soc_codec *codec = dai->codec; u16 reg = snd_soc_read(codec, WM8961_ADDITIONAL_CONTROL_2); if (tristate) reg |= WM8961_TRIS; else reg &= ~WM8961_TRIS; return snd_soc_write(codec, WM8961_ADDITIONAL_CONTROL_2, reg); } static int wm8961_digital_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_1); if (mute) reg |= WM8961_DACMU; else reg &= ~WM8961_DACMU; msleep(17); return snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_1, reg); } static int wm8961_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div) { struct snd_soc_codec *codec = dai->codec; u16 reg; switch (div_id) { case WM8961_BCLK: reg = snd_soc_read(codec, WM8961_CLOCKING2); reg &= ~WM8961_BCLKDIV_MASK; reg |= div; snd_soc_write(codec, WM8961_CLOCKING2, reg); break; case WM8961_LRCLK: reg = snd_soc_read(codec, WM8961_AUDIO_INTERFACE_2); reg &= ~WM8961_LRCLK_RATE_MASK; reg |= div; snd_soc_write(codec, WM8961_AUDIO_INTERFACE_2, reg); break; default: return -EINVAL; } return 0; } static int wm8961_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { u16 reg; /* This is all slightly unusual since we have no bypass paths * and the output amplifier structure means we can just slam * the biases straight up rather than having to ramp them * slowly. */ switch (level) { case SND_SOC_BIAS_ON: break; case SND_SOC_BIAS_PREPARE: if (codec->bias_level == SND_SOC_BIAS_STANDBY) { /* Enable bias generation */ reg = snd_soc_read(codec, WM8961_ANTI_POP); reg |= WM8961_BUFIOEN | WM8961_BUFDCOPEN; snd_soc_write(codec, WM8961_ANTI_POP, reg); /* VMID=2*50k, VREF */ reg = snd_soc_read(codec, WM8961_PWR_MGMT_1); reg &= ~WM8961_VMIDSEL_MASK; reg |= (1 << WM8961_VMIDSEL_SHIFT) | WM8961_VREF; snd_soc_write(codec, WM8961_PWR_MGMT_1, reg); } break; case SND_SOC_BIAS_STANDBY: if (codec->bias_level == SND_SOC_BIAS_PREPARE) { /* VREF off */ reg = snd_soc_read(codec, WM8961_PWR_MGMT_1); reg &= ~WM8961_VREF; snd_soc_write(codec, WM8961_PWR_MGMT_1, reg); /* Bias generation off */ reg = snd_soc_read(codec, WM8961_ANTI_POP); reg &= ~(WM8961_BUFIOEN | WM8961_BUFDCOPEN); snd_soc_write(codec, WM8961_ANTI_POP, reg); /* VMID off */ reg = snd_soc_read(codec, WM8961_PWR_MGMT_1); reg &= ~WM8961_VMIDSEL_MASK; snd_soc_write(codec, WM8961_PWR_MGMT_1, reg); } break; case SND_SOC_BIAS_OFF: break; } codec->bias_level = level; return 0; } #define WM8961_RATES SNDRV_PCM_RATE_8000_48000 #define WM8961_FORMATS \ (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \ SNDRV_PCM_FMTBIT_S24_LE) static struct snd_soc_dai_ops wm8961_dai_ops = { .hw_params = wm8961_hw_params, .set_sysclk = wm8961_set_sysclk, .set_fmt = wm8961_set_fmt, .digital_mute = wm8961_digital_mute, .set_tristate = wm8961_set_tristate, .set_clkdiv = wm8961_set_clkdiv, }; struct snd_soc_dai wm8961_dai = { .name = "WM8961", .playback = { .stream_name = "HiFi Playback", .channels_min = 1, .channels_max = 2, .rates = WM8961_RATES, .formats = WM8961_FORMATS,}, .capture = { .stream_name = "HiFi Capture", .channels_min = 1, .channels_max = 2, .rates = WM8961_RATES, .formats = WM8961_FORMATS,}, .ops = &wm8961_dai_ops, }; EXPORT_SYMBOL_GPL(wm8961_dai); static struct snd_soc_codec *wm8961_codec; static int wm8961_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec; int ret = 0; if (wm8961_codec == NULL) { dev_err(&pdev->dev, "Codec device not registered\n"); return -ENODEV; } socdev->card->codec = wm8961_codec; codec = wm8961_codec; /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { dev_err(codec->dev, "failed to create pcms: %d\n", ret); goto pcm_err; } snd_soc_add_controls(codec, wm8961_snd_controls, ARRAY_SIZE(wm8961_snd_controls)); snd_soc_dapm_new_controls(codec, wm8961_dapm_widgets, ARRAY_SIZE(wm8961_dapm_widgets)); snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); return ret; pcm_err: return ret; } static int wm8961_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); return 0; } #ifdef CONFIG_PM static int wm8961_suspend(struct platform_device *pdev, pm_message_t state) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; wm8961_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8961_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; u16 *reg_cache = codec->reg_cache; int i; for (i = 0; i < codec->reg_cache_size; i++) { if (reg_cache[i] == wm8961_reg_defaults[i]) continue; if (i == WM8961_SOFTWARE_RESET) continue; snd_soc_write(codec, i, reg_cache[i]); } wm8961_set_bias_level(codec, SND_SOC_BIAS_STANDBY); return 0; } #else #define wm8961_suspend NULL #define wm8961_resume NULL #endif struct snd_soc_codec_device soc_codec_dev_wm8961 = { .probe = wm8961_probe, .remove = wm8961_remove, .suspend = wm8961_suspend, .resume = wm8961_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8961); static int wm8961_register(struct wm8961_priv *wm8961) { struct snd_soc_codec *codec = &wm8961->codec; int ret; u16 reg; if (wm8961_codec) { dev_err(codec->dev, "Another WM8961 is registered\n"); ret = -EINVAL; goto err; } mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); snd_soc_codec_set_drvdata(codec, wm8961); codec->name = "WM8961"; codec->owner = THIS_MODULE; codec->dai = &wm8961_dai; codec->num_dai = 1; codec->reg_cache_size = ARRAY_SIZE(wm8961->reg_cache); codec->reg_cache = &wm8961->reg_cache; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = wm8961_set_bias_level; codec->volatile_register = wm8961_volatile_register; memcpy(codec->reg_cache, wm8961_reg_defaults, sizeof(wm8961_reg_defaults)); ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C); if (ret != 0) { dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); goto err; } reg = snd_soc_read(codec, WM8961_SOFTWARE_RESET); if (reg != 0x1801) { dev_err(codec->dev, "Device is not a WM8961: ID=0x%x\n", reg); ret = -EINVAL; goto err; } /* This isn't volatile - readback doesn't correspond to write */ reg = codec->hw_read(codec, WM8961_RIGHT_INPUT_VOLUME); dev_info(codec->dev, "WM8961 family %d revision %c\n", (reg & WM8961_DEVICE_ID_MASK) >> WM8961_DEVICE_ID_SHIFT, ((reg & WM8961_CHIP_REV_MASK) >> WM8961_CHIP_REV_SHIFT) + 'A'); ret = wm8961_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset\n"); return ret; } /* Enable class W */ reg = snd_soc_read(codec, WM8961_CHARGE_PUMP_B); reg |= WM8961_CP_DYN_PWR_MASK; snd_soc_write(codec, WM8961_CHARGE_PUMP_B, reg); /* Latch volume update bits (right channel only, we always * write both out) and default ZC on. */ reg = snd_soc_read(codec, WM8961_ROUT1_VOLUME); snd_soc_write(codec, WM8961_ROUT1_VOLUME, reg | WM8961_LO1ZC | WM8961_OUT1VU); snd_soc_write(codec, WM8961_LOUT1_VOLUME, reg | WM8961_LO1ZC); reg = snd_soc_read(codec, WM8961_ROUT2_VOLUME); snd_soc_write(codec, WM8961_ROUT2_VOLUME, reg | WM8961_SPKRZC | WM8961_SPKVU); snd_soc_write(codec, WM8961_LOUT2_VOLUME, reg | WM8961_SPKLZC); reg = snd_soc_read(codec, WM8961_RIGHT_ADC_VOLUME); snd_soc_write(codec, WM8961_RIGHT_ADC_VOLUME, reg | WM8961_ADCVU); reg = snd_soc_read(codec, WM8961_RIGHT_INPUT_VOLUME); snd_soc_write(codec, WM8961_RIGHT_INPUT_VOLUME, reg | WM8961_IPVU); /* Use soft mute by default */ reg = snd_soc_read(codec, WM8961_ADC_DAC_CONTROL_2); reg |= WM8961_DACSMM; snd_soc_write(codec, WM8961_ADC_DAC_CONTROL_2, reg); /* Use automatic clocking mode by default; for now this is all * we support. */ reg = snd_soc_read(codec, WM8961_CLOCKING_3); reg &= ~WM8961_MANUAL_MODE; snd_soc_write(codec, WM8961_CLOCKING_3, reg); wm8961_set_bias_level(codec, SND_SOC_BIAS_STANDBY); wm8961_dai.dev = codec->dev; wm8961_codec = codec; ret = snd_soc_register_codec(codec); if (ret != 0) { dev_err(codec->dev, "Failed to register codec: %d\n", ret); return ret; } ret = snd_soc_register_dai(&wm8961_dai); if (ret != 0) { dev_err(codec->dev, "Failed to register DAI: %d\n", ret); snd_soc_unregister_codec(codec); return ret; } return 0; err: kfree(wm8961); return ret; } static void wm8961_unregister(struct wm8961_priv *wm8961) { wm8961_set_bias_level(&wm8961->codec, SND_SOC_BIAS_OFF); snd_soc_unregister_dai(&wm8961_dai); snd_soc_unregister_codec(&wm8961->codec); kfree(wm8961); wm8961_codec = NULL; } static __devinit int wm8961_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8961_priv *wm8961; struct snd_soc_codec *codec; wm8961 = kzalloc(sizeof(struct wm8961_priv), GFP_KERNEL); if (wm8961 == NULL) return -ENOMEM; codec = &wm8961->codec; i2c_set_clientdata(i2c, wm8961); codec->control_data = i2c; codec->dev = &i2c->dev; return wm8961_register(wm8961); } static __devexit int wm8961_i2c_remove(struct i2c_client *client) { struct wm8961_priv *wm8961 = i2c_get_clientdata(client); wm8961_unregister(wm8961); return 0; } static const struct i2c_device_id wm8961_i2c_id[] = { { "wm8961", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8961_i2c_id); static struct i2c_driver wm8961_i2c_driver = { .driver = { .name = "wm8961", .owner = THIS_MODULE, }, .probe = wm8961_i2c_probe, .remove = __devexit_p(wm8961_i2c_remove), .id_table = wm8961_i2c_id, }; static int __init wm8961_modinit(void) { int ret; ret = i2c_add_driver(&wm8961_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register WM8961 I2C driver: %d\n", ret); } return ret; } module_init(wm8961_modinit); static void __exit wm8961_exit(void) { i2c_del_driver(&wm8961_i2c_driver); } module_exit(wm8961_exit); MODULE_DESCRIPTION("ASoC WM8961 driver"); MODULE_AUTHOR("Mark Brown "); MODULE_LICENSE("GPL");